[turbofan] Add Int32AddWithOverflow machine operator.

src/compiler/ia32/code-generator-ia32.cc

 // Copyright 2013 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/compiler/code-generator.h"
 
 #include "src/compiler/code-generator-impl.h"
 #include "src/compiler/gap-resolver.h"
 #include "src/compiler/node-matchers.h"
 #include "src/compiler/node-properties-inl.h"
@@ skipping 446 matching lines @@
     // Fall through.
     case kUnsignedLessThanOrEqual:
       __ j(below_equal, tlabel);
       break;
     case kUnorderedGreaterThan:
       __ j(parity_even, tlabel);
     // Fall through.
     case kUnsignedGreaterThan:
       __ j(above, tlabel);
       break;
+    case kOverflow:
+      __ j(overflow, tlabel);
+      break;
+    case kNotOverflow:
+      __ j(no_overflow, tlabel);
+      break;
   }
   if (!fallthru) __ jmp(flabel, flabel_distance);  // no fallthru to flabel.
   __ bind(&done);
 }
 
 
 // Assembles boolean materializations after an instruction.
 void CodeGenerator::AssembleArchBoolean(Instruction* instr,
                                         FlagsCondition condition) {
   IA32OperandConverter i(this, instr);
   Label done;
 
-  // Materialize a full 32-bit 1 or 0 value.
+  // Materialize a full 32-bit 1 or 0 value. The result register is always the
+  // last output of the instruction.
   Label check;
-  Register reg = i.OutputRegister();
+  ASSERT_NE(0, instr->OutputCount());
+  Register reg = i.OutputRegister(instr->OutputCount() - 1);
   Condition cc = no_condition;
   switch (condition) {
     case kUnorderedEqual:
       __ j(parity_odd, &check, Label::kNear);
       __ mov(reg, Immediate(0));
       __ jmp(&done, Label::kNear);
     // Fall through.
     case kEqual:
       cc = equal;
       break;
@@ skipping 42 matching lines @@
       cc = below_equal;
       break;
     case kUnorderedGreaterThan:
       __ j(parity_odd, &check, Label::kNear);
       __ mov(reg, Immediate(1));
       __ jmp(&done, Label::kNear);
     // Fall through.
     case kUnsignedGreaterThan:
       cc = above;
       break;
+    case kOverflow:
+      cc = overflow;
+      break;
+    case kNotOverflow:
+      cc = no_overflow;
+      break;
   }
   __ bind(&check);
   if (reg.is_byte_register()) {
     // setcc for byte registers (al, bl, cl, dl).
     __ setcc(cc, reg);
     __ movzx_b(reg, reg);
   } else {
     // Emit a branch to set a register to either 1 or 0.
     Label set;
     __ j(cc, &set, Label::kNear);
@@ skipping 379 matching lines @@
     return false;
   }
   return *(code->instruction_start() + start_pc) ==
          v8::internal::Assembler::kNopByte;
 }
 
 #endif  // DEBUG
 }
 }
 }  // namespace v8::internal::compiler